public void TestPasswordDerivates()
{
RandomNumberGenerator rng = RandomNumberGenerator.Create();
byte[] salt = new byte[32];
rng.GetBytes(salt);
string password = SHA256.GetSHA256HashAsHexString(GeneralConverters.StringToByteArray("MartinDahl"));
Rfc2898DeriveBytes pDeriveBytes = new Rfc2898DeriveBytes(password, salt, 1000);
Rfc2898DeriveBytes pDeriveBytes2 = new Rfc2898DeriveBytes(password, salt, 1000);
string a1 = GeneralConverters.ByteArrayToHexString(pDeriveBytes.GetBytes(16));
string a2 = GeneralConverters.ByteArrayToHexString(pDeriveBytes2.GetBytes(16));
Assert.IsTrue(a1 == a2, "Passwords derived was not correct");
}
public byte[] Encode(string password)
{
var secureRandom = new SecureRandomGenerator();
var msBlock = new MemoryStream();
var msContent = new MemoryStream();
int leftPaddingLength = secureRandom.GetRandomInt(64, 512);
int rightPaddingLength = secureRandom.GetRandomInt(64, 512);
byte[] sharedSecretBytes = GeneralConverters.StringToByteArray(SharedSecret);
byte[] buffer = BitConverter.GetBytes(leftPaddingLength);
msBlock.Write(buffer, 0, buffer.Length);
buffer = BitConverter.GetBytes(rightPaddingLength);
msBlock.Write(buffer, 0, buffer.Length);
buffer = BitConverter.GetBytes(leftPaddingLength + rightPaddingLength + sharedSecretBytes.Length);
msBlock.Write(buffer, 0, buffer.Length);
msBlock.Write(secureRandom.GetRandomData(leftPaddingLength), 0, leftPaddingLength);
msBlock.Write(sharedSecretBytes, 0, sharedSecretBytes.Length);
msBlock.Write(secureRandom.GetRandomData(rightPaddingLength), 0, rightPaddingLength);
byte[] encodeBytes = msBlock.ToArray();
encodeBytes = EncryptionManager.EncryptData(encodeBytes, password);
byte[] hashBytes = SHA512.Create().ComputeHash(encodeBytes, 0, encodeBytes.Length);
buffer = BitConverter.GetBytes(encodeBytes.Length);
msContent.Write(buffer, 0, buffer.Length);
msBlock.WriteTo(msContent);
buffer = BitConverter.GetBytes(hashBytes.Length);
msContent.Write(buffer, 0, buffer.Length);
msContent.Write(hashBytes, 0, hashBytes.Length);
return(msContent.ToArray());
}